Coating machine



LJB. CASE comma MACHINE Filed June 11. 1926 3 Sheets-Sheet l f x vi Feb.11, 1930.

L. B. CASE Feb. 11, 1930.

COATING MACHINE Filed June 11, 1926 3 Sheets-Sheet 2 Z kw L. B. CASEFeb. 11, 1930.

COATING MACHINE Filed June 11, 1926 3 Sheets-Sheet Patented Feb. 11,1930 UNITED STATES PATENT OFFICE LYNN B. CASE, OF NEW BRUNSWICK, NEWJERSEY, ASSIGNOR TO JOHN WALDRON CORPORATION, OF NEW BRUNSWICK, NEWJERSEY, A CORPORATION OF NEW JERSEY COATING MACHINE Application filedJune 11,

The principal object of my invention is to provide an improved machinefor coating web materials, including various papers and fabrics where itis desired to treat the surface thereof, for the purpose of filling thepores of the material and for various other reasons well known to thosefamiliar with the art.

One object of my invention is to provide an improved coating table overwhich the material passes, the table being of arcuate form, 011 whichthe material being coated is maintained in a taut and even condition,thereby preventing wrinkles in the material while undergoing treatment.

An improved feature of the invention is the provision of a suitablerubber apron for carrying the material to be coated over the coatingtable.

Another object of the invention is to provide a series of batteries ofvibrating brushes, for distributing the coating material over thesurface of the web undergoing treatment; and means for operating eachbrush which will insure full contact of each brush with the web,throughout the entire reciprocation thereof.

Another improved feature of the invention is the means for causing thematerial being coated to travel over the coating table, and includes avacuum or suction box cooperating with a perforated belt which engagesthe web material, causing it to adhere to the perforated belt whilepassing over the vacuum box, the perforated belt being operatively andsynchronously connected to the conveying apron, which is driven at itsdelivery end from asuitable source of power.

Another object of the invention is to provide a suitable device forapplying the coating material to the web material and driving the colorapplying apparatus by means of the conveying apron, from its receivingend.

Improved means is also provided for controlling the amount of brakingfriction on the roll of stock in order to maintain the proper amount oftension on the web material as it passes through the coating machine.

I also provide improved means by which the stock to be coated may bequickly and 1926. Serial No. 115,398.

efficiently threaded through the machine, including means for loweringthe coating table out of contact with the vibrating brushes whereby theoperator may conveniently thread the web material therebetween.

Another feature of the invention is to provide chilled iron rolls overwhich the web material passes, at the point where the coating materialis applied thereto, the purpose of the chilled rolls being to prevent orreduce erodingof the rolls by the action of coating material, which inmany instances is of a gritty nature.

Other objects and details of construction of the invention will be morefully disclosed hereinafter, reference being had to the accompanyingdrawings, of which:

Fig. 1 is a side elevation of my improved coating machine;

Fig. 2 is a longitudinal sectional elevation of one end of the machine,drawn on somewhat of an enlarged scale;

Fig. 3 is a transverse sectional elevation taken along the line 33 ofFig. 1; and

Fig. 4 is a longitudinal sectional elevation of the suction box, and itsco-operating perforated belt forming a detail of the inven tion.

Referring to Fig. 1 of the drawing, one of the side frames of themachine is illustrated at 1, it being understood that a similar frame 1*is located at the opposite side of the machine for providing a suitablesupport for the elements of the machine.

The web material to be coated is placed upon the machine in the form ofa roll m, being rotatably mounted on the side frames, and placed underthe control of braking mechanism hereinafter more fully described, andwhereby the rotation of the roll :20 is retarded. The material passesfrom the roll m in the form of a web a. under a guide roll 2 rotatablymounted on the side frames 1, 1 to and over a second guide roll 3, alsorotatably mounted on the side frames, thereafter passing under a guideroll 4 rotatably mounted in bearings 5, 5 which are adjustably mountedon the side frames 1, 1. The web :2 passes over a guide roll 6 rotatablymounted in the side frames, and under a chilled iron roll 7, providedwith trunnions 8 and 9, rotatably mounted insuitable bearings 10 and 11secured to the side frames 1 and 1 of the machine.

Parallel to and adjacent the roll 7 is a hollow or pipe roll 12 which isprovided with trunnions 13 and 14 rotatably mounted in the bearings 10and 11 respectively. The roll 12 supports one end of an apron 15 whichmay be composed of rubber or other suitable material, the opposite endof which passes around and is supported by a second pipe roll 16provided with trunnions 17 mounted in bearings 19, which are adjustablymounted on the side frames 1 and 1*, for the purpose of adjustingthetension of the apron 15.

Upon referring to Fig. 2 of the drawing, it will be noted that the roll12 occupies a position in a horizontal plane considerably below that ofthe roll 16.

Intermediate the rolls 12 and 16, I provide my improved coating table 20over which the apron 15 passes, the web 012 also passing over the table20 in contact with the upper surface of the apron 15. The web a passesfrom the apron 15 onto a perforated belt 21, rotatably supported onrollers 23 and 24 suitably mounted on the frames 1 and 1.

Intermediate the rolls 23 and 24, I provide a vacuum box 25 whichproduces a suction through the perforations of that portion of the belt21 immediately overlying the vacuum box 25. The web 00 in passing fromthe apron 15, lies in contact with'the upper run of the belt 21, and bymeans of the vacuum box 25.

is maintained in substantially rigid contact with the belt 21.

The coating material is applied to the web a2 immediately adjacent thechilled roll 7 by means of a revolving brush 26, the brush 26 receivinga supply of coating material from a tank 27 by means of a color roll 28which is maintained at a position partially submerged in the materialwithin the tank 27, and in contact with the brush 26.

Initial spreading of the coating material is effected by means of astationary brush 29 adjustably mounted on the side frames 1 and 1, andimmediately overlying one end of the coating table 20 and in contactwith the web of material as it passes over the chilled roll 7 and ontothe apron 15.

Uniform distribution of the coating material is accomplished by means ofa series of batteries of vibrating brushes illustrated at 30, 31 and 32of Fig. 2. In the present instance, each of the batteries 30, 31 and 32comprises a series of brushes 35, 36 and 37. Each of the brushescomprises bristles 38 suitably secured in a back 39. The back 39 of eachof the brushes is secured to the underside of a transverse bar 40,slidably mounted at each of its ends in a bearing block 41 and 42respectively. The bearing blocks 41 and 42 are adjustably mounted inbrackets 43 and 44 secured to the side frames 1 and 1 respectively.Vertical adjustment of the bearing blocks 41 and 42 within the brackets43 and 44, is effected by means of jack-screws 45 which are providedwith lock nuts 46, as shown in Figs. 2 and 3.

Pivoted at a point 47 to each of the bars 4( is a link 48, Fig. 3, whoseopposite end is pivoted, at a point 49, to an arm 50'projecting from aneccentric strap 51 rotatably mounted 011 an eccentric 52. The eccentricsof each battery of brushes are each 'adjustably mounted on a short shaft53 rotatabl mounted in bearings 54 secured to the side rame 1 of themachine.

Each of the eccentrics '52 comprises a flanged eccentric element 55secured to the shaft 53 and a double eccentric ring 56 adjustablymounted thereon. One flan e of the fixed eccentric 55 is provided withworm wheel teeth 57 adapted to be engaged by a worm 58 secured to ashort shaft 59 rotatably mounted in bearings 60 on the double eccentricring 56. The shaft 59 is provided with a head 61, by means of which theeccentric ring 56 may be revolved around the eccentric 55, from aposition wherein the centre of a circle defining its outside face iscoincident with the centre of the shaft 53, as one extreme position tothe other extreme position wherein the said centre of the ring 56, thecentre of the eccentric 55 and centre of the shaft 53 are all distantfrom and in lateral alignment with each other, whereby the amount ofreciprocation of the various brushes may be minutely controlled andadjusted from zero to the maximum.

Each bearing block 41 is provided with a. bracket 62 to which ispivoted, at 63, a link 64, the opposite end of which is pivoted at 49 tothe connecting link 48 and the arm 50 on the eccentric strap 51. Thelink 64 is adapted to convert all rotary motion of the eccentric into ahorizontal motion of the strap and its asso-.

ciated brush and prevent raising of the respective brush from thesurface of web material undergoing treatment.

Each of the reciprocating brushes is provided with a lug 65 extendinglaterally from each side of the bar ,40 thereof and having an aperture66 therein aligned with a threaded opening 67 in each bearing block 42.A rod 68 is secured in each of the apertures 67 and slidably extendsthrough the respective aligned aperture 66 in the lugs 65. A spring 69encircles each rod 68 and is confined between each of the lugs 65 andthe block 42, for the purpose of absorbing any lost motion between thereciprocating elements connected with the brushes.

The coating table 20 comprises side frames 7 0, 70 suitably braced bytransversely extending bars 71, 71. A wooden platform 72 extends betweenand is suitably secured to the side frames 70, 70 and is faced with acoverfiat t ereon in its movement thereover.

The table 20 is adjustable in a substantially vertical direction withrespect to the side frames 1 and 1 of'the machine and for this purpose apair 'of transversely extending shafts 74, 74 are provided, which arerotatably mounted in bearings 7 5, 75 secured to the frames 1 and 1.Each shaft 74 is provided with an eccentric 76 adjacent each end thereofand engaging a block 77 secured to the under side of the frames 70, 70.Each shaft 74 is provided with a mitre gear 78 at its end extendingbeyond the frame 1 anda connecting shaft 79, is provided with mitregears 80 meshing with the gears 78, 78 is rotatably' mounted inbearingsSl, 81 secured to the side frame 1 of the machine. A crank 82 orother suitable device is employed for rotating the shafts 74, 74,whereby the table '20, through the action of the eccentrics 76, 76, maybe raised or lowered.

Any suitable means may be provided for retaining the table in itsadjusted position and for the purpose of illustration I have shown aratchet wheel 83 secured to one shaft 74, engaged by a pawl 84 pivotedto the frame 1*.

Vertical movement of the table 20 is permitted and longitudinal andtransverse movement thereof prevented by means of guide rods 123, 123secured to the under side of the table 20 and being adapted to slide inapertured brackets 124, 124 secured to the side frames 1, 1 ofthemachine.

F or the purpose of driving the reciprocating brushes each of thebattery drive shafts 53 is provided with a pulley 85. The pulleys 85 arerespectively connected by belts 85 85 and 85 to drive pulleys 86, 87 and88. The pulleys 86 and 87 areeach secured to one end of a shaft 89,rotatably mounted in bearings 90 secured to the frame of the machine.The pulley 88 is secured to a shaft 91 rotatably mounted in bearings 92secured to the frame of the machine.

On each of the shafts 89, 89 is a second ul- ,ley 93 and on the shaft 91is a pair of pul eye 94. 94 around each of which and each of the pulleys93 a belt 95 passes, thereby operatively connecting the shafts 89, 89and 91. A main pulley 96 is secured to the shaft 91 and is adapted to beoperatively connected to any source of power (not shown).

A second main pulley 100 is secured to a shaft 101 rotatably mounted inbearings on the main frames of the machine and is adapted to supplypower to the other elements of the machine. Secured tothe shaft 101 is asprocket wheel 102 connected by means of a sprocket chain 103 with asprocket 104 secured to the shaft 18 whereby the belt 15 is driven.

A second sprocket wheel-105 on the shaft 18 is connected by means of a srocket chain 106 with a sprocket 107 on one o the trunnions of.

the roller 23, whereby the perforated belt 21 isdriven.

On the trunnion 14 of the pipe roller 12 is a sprocket wheel 108 whichconnects by means of a sprocket chain 109 with a sprocket wheel 110 onthe trunnion 9 of the chilled roller 7, a second sprocket 111 thereonbeing connected by a sprocket chain 112 with an input sprocketwhecl 113on a speed changing device 114, the output sprocket 115 thereof beingconnected by a chain 116 with a sprocket 117 on the shaft of the colorroller 28. brush 26 is rotated through a trainof gears 119, 120 and 121,the first of which is secured to the trunnion 90f the roller 7 and thelast thereof is secured to the shaft of the brush 26.

It will be understood that the brush 26 may I be adjusted with respectto the roller 7, and the coating material reservoir 27 with the colorroll 28 may be adjusted with respect to the brush 26, on the main frameof the machine. v

In order to maintain a definite and proper working tension on the web ofmaterial as it passes through the machine I provide a special mountingfor the roll as of the material. The roll is provided with a shaftrotatably mounted in bearings 126 at each end thereof-and each beingsecured to a beam 127 mounted on oneof the main frames '1, 1 by means ofroller bearings 128, 128. A brake drum 129 issecured to one end of theshaft 125 and is operatively engaged and partiallyencircled by a brakeband 130, one end of which is adj ustablny secured to the beam 127, theother end thereof being pivoted to one le of a bell crank lever 131pivoted at 132 to the beam 127. The other leg 133 of the bell cranklever is in the form of a wedge and is adapted to have its angular sideengaged by a roller 134 rotatably mounted on the frame 1. The oppositeend of the beam 127 is provided with a gear rack 135', meshing with apinion 136, secured to a shaft 137 rotatably mounted in the frame 1. Aplain faced wheel 138 is secured to the shaft 137 and has one end of astrap 139 secured thereto, the strap passing around a pulley 140 andhaving an adjust-able Weight comprising removable discs 141 suspended onits free end.

The weights 141 tend to force the supporting beams, with the roll :11and the bell crank,

The

. stricted unwinding of the material from the roll av.

The up aratus above described may be employed or applying various formsof coating material to various kinds of web ma terials, such, forexample, as a fine clay suspended in a suitable carrying fluid andadapted to be applied to a web of paper or cloth for. filling the poresof the web.

Having described one embodiment of my invention in detail, variousmodifications i thereto will inevitably present themselves to onefamiliar with the mechanical arts, therefore, only such limitationsshould be placed upon the scope of'the invention as are prescribed bythe appended claims; or dictated by the prior art of record.

I claim: A In a machine for coating web material, the

combination of a longitudinally-arched table,

a conveyer extending longitudinally of the table with a portion of theconveyor lying on the arched surface of the table and conforming to thecurvature thereof, said conveyer being adapted to receive the web at oneend of the table and deliver it from the opposite end of the table, aconvever supporting roll at the delivery end of the table, a conveyersupporting roll at the receiving end of the table, a web gripping meansadjacent the.

delivery end of the table for drawing the web through the machine, meansfor driving the I conveyer supporting roll which is located at thedelivery end of the table whereby the portion of the conveyer lying onthe arched table is drawn taut over and moved longitudinally along thearched table in a direction from the receiving end toward the deliveryend thereof, means for driving the web gripping means in synchronismwith the conveyor whereby the said web is drawn taut on the conveyer,means for applying a coating ma terial to the web adjacent the receivingend of the table, means overlying the table for distributing the coatingmaterial 'over the surface of the .web, and means for moving the tabletoward and away from the distributing means whereby the conveyor may beslacked and readily removed from the machine for repair and replacementwithout disturbing the said distributing means.

LYNN B. CASE.

